Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Connect differential inputs with DC source, no ac signal. Add ac=1 at VDD source. Now you are injecting ac noise at VDD. Run AC analysis from 1 to say 1GHz. Plot opamp Vout. This will tell you how is the Vdd noise attenuation at the Vout. More the negative value, the better is PSRR. Hope this helps.